My screen wash has been playing up due to a blockage somewhere. Had new washer jets put on 3 months ago and already the passenger side has stopped squirting! 8-(.
I took the resevoirs out to clean crap out of the large one and noticed that the connector which connects to the black box mentioned above was just resting beneath the box, not actually plugged into it. Mine has German writing on it and cant read that! It doesnt connect to anything else,it just has the connector which should be plugged into it. I guess it is some kind of controller? It has a six pin connection FYI.
I know I could just plug it in, but I`m wondering if it was unplugged for a reason. If I know what it does I can decide about plugging it back it again. I haven`t noticed anything not working though, although I havent checked to see if the headlight wash/wipers work yet since owning the car.